that oneeseaesa;aesaéseaésa;aésa(more remote)aquellaaquella;laaquellaaquéllaaquélla;laaquélla

In the past the standard spelling for [ese/esa] and [aquel/aquella] used as pronouns (as when they are used to translate [that one]) was with an accent ([ése/ésa] and [aquél/aquélla]). Nowadays the [Real Academia Española] advises that the accented forms are only required where there might otherwise be confusion with the adjectives [este/esta] and [aquel/aquella].

which video do you want? — that oneof all his records, I like that one best

[Aquel] is used to refer to a time in the distant past. Use [ese] if you mention a concrete date, month, year etc:

do you remember that holiday we had in Holland?¿te acuerdas de aquellas vacaciones que pasamos en Holanda?;1992? I can't remember where we holidayed that year¿1992? no recuerdo dónde pasamos las vacaciones ese año;May? we can't come that month because we'll be moving house¿en mayo? no podemos venir ese mes porque nos estaremos mudando de casa

pronombre demostrativo

The pronoun [that] ([one]) is translated by [ese] and [aquel] (masc), [esa] and [aquella] (fem) and [eso] and [aquello] (neuter). You can generally use [ese] etc when pointing to something near the person you are speaking to. Use [aquel] etc for something which is distant from both of you. Note that in the past the standard spelling for the masculine and feminine pronouns was with an accent ([ése/ésa] and [aquél/aquélla]). Nowadays the [Real Academia Española] advises that the accented forms are only required where there might otherwise be confusion with the adjectives [ese/esa] and [aquel/aquella]. Neuter pronouns never carry an accent.

the man that came inel hombre que entró;the book that I readel libro que leí;the houses that I paintedlas casas que pinté;the girl that he met on holiday and later marriedla chica que conoció durante las vacaciones y con la que después se casó;all that I havetodo lo que tengo;fool that I am!¡tonto que soy!

But I still miss him, fool that I amAnd fool that she was, she trusted him!And Martin, idiot that he is, didn't tell me!

2(with preposition)

If the [that] clause ends in a preposition, you can either translate [that] as [que] (usually preceded by the definite article) or as article + [cual]/[cuales]. Use the second option particularly in formal language or after long prepositions or prepositional phrases:

the actor that I was telling you aboutel actor del que te hablaba;the car that she got intoel coche al que se subió